Mass per volume density.
Pounds per Cubic foot to Ounces per Imperial gallon Converter — lb/ft3 to oz/imp gal
Convert Pound per Cubic foot (lb/ft3) to Ounce per Imperial gallon (oz/imp gal) using the exact conversion factor (1 pound per cubic foot = 2.568698452 ounce per imperial gallon). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Ounces per Imperial gallon converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 16.01846337 / 6.236023291.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic foot to Ounces per Imperial gallon
Pound per Cubic foot and Ounce per Imperial gallon both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Pound per Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
ounces per imperial gallon = pounds per cubic foot × 2.56869845177
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic foot equals 16.018463374 base units, and 1 ounce per imperial gallon equals 6.23602329144 base units, so dividing one by the other gives the direct pound per cubic foot-to-ounce per imperial gallon factor of 2.56869845177.
Simple example
1 lb/ft3 × 2.568698452 = 2.568698452 oz/imp gal
1 pound per cubic foot = 2.568698452 ounces per imperial gallon.
Real-world example
1,000 lb/ft3 × 2.568698452 = 2,568.698452 oz/imp gal
1,000 pounds per cubic foot = 2,568.698452 ounces per imperial gallon.
Conversion table
| Pound per Cubic foot (lb/ft3) | Ounce per Imperial gallon (oz/imp gal) |
|---|---|
| 0.1 lb/ft3 | 0.2568698452 oz/imp gal |
| 1 lb/ft3 | 2.568698452 oz/imp gal |
| 10 lb/ft3 | 25.68698452 oz/imp gal |
| 100 lb/ft3 | 256.8698452 oz/imp gal |
| 1,000 lb/ft3 | 2,568.698452 oz/imp gal |
| 10,000 lb/ft3 | 25,686.98452 oz/imp gal |
Reverse conversion: Ounce per Imperial gallon to Pound per Cubic foot
2.568698452 oz/imp gal × 0.3893022162 = 1 lb/ft3
2.568698452 ounces per imperial gallon = 1 pounds per cubic foot.
pounds per cubic foot = ounces per imperial gallon × 0.38930221619
For a page dedicated to this direction, see Ounce per Imperial gallon to Pound per Cubic foot.
Understanding the Pound per Cubic foot
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Where it's used: United States (construction, engineering, materials specifications)
Uses of the Pound per Cubic foot today
- US construction material density specs (concrete, soil, lumber, insulation)
- US engineering material property tables
- Bulk material handling and shipping weight estimates
Understanding the Ounce per Imperial gallon (oz/imp gal)
Mass per volume density.
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ounces per imperial gallon are in 1 pound per cubic foot?
1 pound per cubic foot equals 2.568698452 ounces per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to ounce per imperial gallon?
Multiply the pound per cubic foot value by 2.568698452. The converter above does this instantly to whatever precision you set.
How do I convert ounce per imperial gallon back to pound per cubic foot?
Use the reverse factor: 1 ounce per imperial gallon equals 0.3893022162 pounds per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic foot?
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
What is a ounce per imperial gallon?
Ounce per Imperial gallon (oz/imp gal) is a unit of density.
Is the pound per cubic foot to ounce per imperial gallon conversion exact?
Yes. Both pound per cubic foot and ounce per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 2.568698452 used above is exact to as many digits as you choose to display.
Where is the pound per cubic foot still used today?
United States (construction, engineering, materials specifications)
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.